360 Magnum winter project!

I have enjoyed my little "Throw Away 318" this summer and it will live on in another project at some point, but I am looking toward the spring and having more power to do fun things with!
I am using the parts listed because I have them and am trying to put this together as economically as possible.
The car,
74 Duster, full street weight with AC and all!
A-500 auto/od trans that will get a custom high stall lock up converter from CopeRacing Transmission once I decide on the motor specs.
3.91 SG 8-3/4 rear.
I picked up a low mileage 360 Magnum from a friend who totalled and stripped an 01 Dodge truck. My plan is to use the stock short block (check, replace rings, bearings oil pump), a pair of CNC ported Speedmaster Aluminum heads, Comp roller tipped rockers (1.5 to 1 ratio), push rod oiling, an Edelbrock Torker 2 single plane intake, LA front dress (timing chain cover, water pump etc). I have a Quickfuel 750 double pumper for it. It will use cheap Patriot Headers and dual 2.5" exhaust.
The unknown for me is the cam shaft. I will use a hydraulic roller and reuse the factory roller lifters, but I want an LA cam that can run a mechanical fuel pump.
I want as much power as possible while retaining the power brakes and vacuum operated AC controls. I am open to a custom cam or an off the shelf cam but I just don't know enough about cam specs to choose one or to know if I will get what I want if I blindly trust a custom cam grinder.
I was going to copy the cam in 318willrun's drag truck engine but he has stock Magnum heads and 1.6 ratio rockers so I'm not sure, I definitely won't get the performance he is getting if I just have 1.5 to 1.
If anyone has suggestions or advice I'd love to hear it!

Cley